The 21-year-old only joined Brentford from West Ham during the summer, but his performances have already attracted attention from two of the Premier League's biggest clubs.
According to a report from Senegalese outlet D Sports, both Chelsea and Liverpool have registered their interest with the player's representatives as they consider strengthening their options on the left side of defence.
The potential moves are being discussed with next summer in mind rather than the January transfer window, meaning Diouf could become the subject of a transfer battle at the end of the campaign.
Brentford are in a strong negotiating position after making the defender a significant part of their plans. The club will be aware, however, that interest from Chelsea and Liverpool could present a major temptation for the young Senegalese.
Diouf has already demonstrated the physical qualities that make him an attractive prospect, combining athleticism with an ability to contribute in attacking areas.
His willingness to get forward and provide an option in the final third has helped establish his reputation as one of the promising young left-sided defenders in English football.
Both interested clubs have reasons to consider their options in the position, although any move would depend on how Diouf develops during his first season at Brentford.
For now, the Bees have control of the situation and will hope their recent investment in the defender is rewarded with further progress.
With the summer window still some distance away, there is plenty of time for the interest to develop. However, the reported initial contact suggests Diouf's future could become a significant transfer story in the months ahead.